18337018687018 has 8 divisors (see below), whose sum is σ = 27556370043300. Its totient is φ = 9151562005920.

The previous prime is 18337018686997. The next prime is 18337018687027. The reversal of 18337018687018 is 81078681073381.

It can be written as a sum of positive squares in 2 ways, for example, as 18278506463569 + 58512223449 = 4275337^2 + 241893^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8473667443 + ... + 8473669606.

Almost surely, 2^{18337018687018} is an apocalyptic number.

18337018687018 is a deficient number, since it is larger than the sum of its proper divisors (9219351356282).

18337018687018 is a wasteful number, since it uses less digits than its factorization.

18337018687018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16947337592.

The product of its (nonzero) digits is 10838016, while the sum is 61.

The spelling of 18337018687018 in words is "eighteen trillion, three hundred thirty-seven billion, eighteen million, six hundred eighty-seven thousand, eighteen".